| 1 | They secretly entered into collusion with the northern warlords. | |
| 2 | He is very interested in the history of the Beiyang Warlords. | |
| 3 | Yeh Kai-hsin was a general on the side of the Northern warlords who fought against the revolution. | |
| 4 | Bandits and warlords are important topics of that age during the Period of the Northern Warlords. | |
| 5 | Northeast railway mainly by the government, and the northern warlords, Russia and Japan etc. |